JP4480451B2 - Projection-type image display device and display system - Google Patents

Description

  The present invention relates to a projection display apparatus, and more particularly to a projection display apparatus that allows a viewer or a user to select and view only one of two different images simultaneously projected on the same screen. The present invention also relates to a display system provided with such a projection display apparatus.

  The light emitted from the light source is separated into two orthogonally polarized lights, and each polarized light is modulated and displayed with different images so that the viewer can select and view either or both images. Proposed projection display devices have been proposed. (For example, see Patent Documents 1 and 2)

Japanese Patent Laid-Open No. 10-288958 JP 2000-250129 A

  In a conventional projection display apparatus, two different images obtained by modulating two orthogonal polarizations with a video signal are simultaneously displayed on the same screen, and viewers are allowed to wear polarized viewing glasses as necessary. Thus, one or both of the videos can be viewed, but the same additional information (caption and device operation instruction information) is displayed when either video is selected. For this reason, in countries where multiple languages are widely used, such as Canada where English and French are widely used, and China where Mandarin and Cantonese are widely used, international conferences where multiple languages are used, etc. When a conventional projection display apparatus is used, sufficient information transmission cannot be performed. In addition, even in movie screenings on international passenger planes where passengers who use different languages ride together, the conventional projection video display device can only provide subtitles in one language, so the service to passengers was limited .

  The present invention has been made to solve the above-described problems of the prior art, and its purpose is to display additional information (subtitles and device operation instruction information) in a selected language and selectively An object of the present invention is to provide a projection display apparatus that can be visually recognized.

The projection display apparatus of the present invention is
In a projection display device that projects an image on a screen,
Polarization separation means for separating light emitted from the light source means into two mutually orthogonal first and second polarized light;
The first subtitle signal representing the first subtitle in the first language is synthesized with the first video signal to generate the first composite video signal, and the second subtitle in the second language is represented. Video signal processing means for combining the second caption signal and the second video signal to generate a second composite video signal;
A first video light having the first polarization modulated by the first composite video signal is output by passing the first polarization at a pass rate according to the first composite video signal. 1 image light forming means;
A second image light of the second polarization modulated by the second synthesized video signal is output by passing the second polarized light at a pass rate according to the second synthesized video signal. Two image light forming means;
Combining and projecting the first and second image lights and projecting them to display an image ;
Storage means for storing image data of first and second operation instruction characters expressed in at least two languages ,
The video signal processing means synthesizes the image data of the first operation instruction character together with the first video signal together with the first caption signal, and the image data of the second operation instruction character. Combine with the second video signal together with the second caption signal
It is characterized by this.

  According to the projection display apparatus of the present invention, additional information (captions) in two selected languages can be displayed at the same time, and one of them can be selectively viewed, so that a plurality of languages are widely used. When used in conferences or international conferences in other countries, more effective information transmission becomes possible. In addition, it is possible to improve the service for passengers even in movie screenings in passenger planes where passengers with different languages speak.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a schematic diagram showing a configuration of a projection display apparatus according to Embodiment 1 of the present invention. As shown in the figure, this projection type image display apparatus projects an image on a screen 12, and includes a light source means, for example, a light source lamp 1, a polarization separation means 2 constituted by a polarization beam splitter, and an operation input means 3. A selection circuit 4, a video signal processing circuit 5, first and second video light forming means 6P, 6S, a polarization beam combining means 7 comprising, for example, a polarization beam splitter, and a projection lens as a video projection means 8 and is combined with viewing glasses 9P and 9S as polarization viewing means to constitute a display system.
The operation input means 3 is used by an operator or a user to give an operation input in order to select a subtitle language to be displayed on the projection display apparatus. It is composed of a combination of

  The selection circuit 4 selects and outputs a signal corresponding to the language specified by the operation input means 3 from the signals output from the video signal output device 10 constituted by, for example, a DVD player.

  As described above, as the selection circuit 4, instead of selecting and outputting a part of the signals output from the video signal output device 10, among the signals that the video signal output device 10 can output, A device having a function of controlling the video signal output device 10 so as to selectively read out only the signal corresponding to the language designated by the operation input means 3 may be used.

As shown in FIG. 1, the light emitted from the light source lamp 1 is incident on the polarization separating means 2 and separated into two mutually orthogonal polarized lights, that is, P wave and S wave. The P wave is guided to enter the image light forming unit 6P, and the S wave is guided to enter the image light forming unit 6S.
Each of the image light forming means 6P and 6S is composed of, for example, a single color liquid crystal display panel. A single-plate color liquid crystal display panel is configured such that, for example, red, green, and blue color filters, which are the three primary colors of light, are arranged to cover adjacent pixels, and realizes color display by visual integration effect.

When the user selects the subtitle language with the operation input means 3, the language number signals Lg1 and Lg2 representing the selected language are supplied to the video signal processing circuit 5 and also to the selection circuit 4, and the video signal output device Of the ten output signals (or signals that can be output), video signals Pi1 and Pi2 corresponding to the selected language and subtitle signals SB1 and SB2 representing subtitles described in the selected language are processed as video signals. It is supplied to the circuit 5.
As an example, it is assumed that the video signals Pi1 and Pi2 are of the same video. The caption signals SB1 and SB2 are associated with the video signals Pi1 and Pi2.

  When the output signal (or signal that can be output) of the video signal output device 10 does not include a language corresponding to the language specified by the operation input means 3, display means (not shown) associated with the operation input means 3 is used. ) May be displayed, or a signal in a predetermined language may be selected.

The video signal processing circuit 5 synthesizes the caption signal SB1 with the video signal Pi1 to generate a synthesized video signal Ps1. The composite video signal Ps1 is obtained by superimposing the subtitle represented by the subtitle signal SB1 on the designated position of the video represented by the video signal Pi1, and the position on the video where the subtitle is superimposed is the subtitle signal. It is specified by position information attached to SB1.
The video signal processing circuit 5 also synthesizes the caption signal SB2 with the video signal Pi2 to generate a synthesized video signal Ps2. The composite video signal Ps2 is obtained by superimposing the subtitle represented by the subtitle signal SB2 on the designated position of the video represented by the video signal Pi2, and the position on the video where the subtitle is superimposed is the subtitle signal. It is specified by position information attached to SB2.

  For example, when the language numbers Lg1 and Lg2 indicate English and French, respectively, as shown in FIG. 2A, the video represented by the video signal Ps1 is provided with English subtitles, and FIG. ), The video represented by the video signal Ps2 has a French caption.

The liquid crystal panel 6P transmits the P wave at a transmittance corresponding to the saturation of each pixel represented by the video signal Ps1 supplied from the video signal processing circuit 5, thereby modulating the P wave modulated by the video signal Ps1. Video light PP is output.
The liquid crystal panel 6S transmits the S wave at a transmittance corresponding to the saturation of each pixel represented by the video signal Ps2 supplied from the video signal processing circuit 5, thereby modulating the S wave modulated by the video signal Ps2. Video light PS is output.
As a result, the image light PP (P-wave image light) is generated on the liquid crystal panel 6P to generate an image with English subtitles, while the same image light is generated, and the image on which the French subtitle image is generated on the liquid crystal panel 6S. Light PS (S wave image light) is formed.

  The P-wave and S-wave image lights PP and PS from the liquid crystal panels 6P and 6S are combined by the polarization combiner 7 into one combined image light PC, which is projected from the projection lens 8 onto the screen 12 and projected. It becomes. The state of this synthesis is shown in FIG.

  A viewer V1 who wants to view video with English subtitles uses P-wave viewing glasses 9P with a polarizing film that transmits P waves, while a viewer V2 who wants to watch video with French subtitles receives S waves. By using the S-wave viewing glasses 9S to which a polarizing film to be transmitted is attached, it is possible to visually recognize video with captions in a desired language.

In the first embodiment, the video signal Pi1 and the video signal Pi2 have been described as having the same content. However, the video signal Pi1 and the video signal Pi2 may have different content.
In the first embodiment, the image light forming means 6P and 6S have been described as being composed of single-plate color liquid crystal display panels. Instead, the image light forming means 6P, 6S separates the input light into three primary color lights of red, green, and blue, and makes each primary color light incident on three liquid crystal panels, corresponding to each primary color light. A three-plate type may be used in which three images are obtained and then combined again.

  Further, the image light forming means 6P and 6S may be constituted by a liquid crystal panel that generates monochrome image light. In this case, the liquid crystal panel constituting the image light forming means 6P transmits the P wave at a transmittance according to the luminance of each pixel represented by the image signal Ps1 supplied from the image signal processing circuit 5, The liquid crystal panel that outputs the P-wave image light PP modulated by the image signal and constitutes the image light forming means 6S corresponds to the luminance of each pixel represented by the image signal Ps2 supplied from the image signal processing circuit 5. The S wave image light PS modulated by the image signal is output by transmitting the S wave with a high transmittance.

  In the above example, the transmissive image light forming means 6P and 6S are used, but instead, a reflective image light forming means constituted by, for example, a micromirror device (DMD) may be used. In this case, the polarized light is reflected with a reflectance corresponding to the saturation and luminance of each pixel represented by the video signal. In the present application, the transmission of light in the transmission type image light forming unit and the reflection of light in the reflection type image light forming unit are progressing along the optical path to the screen. Say.

  In the above example, the two image lights are synthesized by the polarization synthesizing means 7 constituted by, for example, a polarization beam splitter, and the synthesized image light is projected onto the screen 12 by the projection lens 8. A projection lens that projects the image light from the means 6P onto the screen 12 and a projection lens that projects the image light from the image light formation means 6S onto the screen 12 may be provided separately. In this case, the projection lens also serves as a combining unit. In other words, in the example shown in FIG. 1, the polarization synthesizing unit 7 and the projection lens 8 constitute a synthesizing projection unit that synthesizes two image lights and projects them to display an image.

Embodiment 2. FIG.
FIG. 4 is a block diagram showing the configuration of the projection display apparatus according to Embodiment 2 of the present invention. 4, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, but the signal processing in the video signal processing circuit 5 is different, and the difference is that a memory 11 is provided as storage means.

  Projection-type image display devices are generally equipped with various functions such as image adjustment functions such as brightness, contrast, and hue, enlargement, left-right inversion, upside-down inversion, and input signal switching. In many cases, a function selection menu is synthesized and displayed on a projected image so that an arbitrary function can be easily selected and executed from a plurality of functions. For example, a function selection menu as shown in FIG. 5 is combined with the projected image. In many cases, the function selection menu includes operation instruction characters, and the displayed characters differ depending on the set language. The language setting of the function selection menu is generally prepared as a part of the function of the function selection menu, and is configured such that the user of the projection display apparatus selects an arbitrary language from the function selection menu.

  4, a plurality of, for example, five language function selection menus shown in FIG. 6, for example, are prepared in the memory 11, and graphic data of messages corresponding to the respective languages are recorded.

  To select and read the function selection menu for each language, the menu language number of the function selection menu for that language is input to the memory 11. For example, to read an English function selection menu, “2” is input to the memory 11 as the menu language number.

  The video signal processing circuit 5 outputs menu language numbers L1 and L2 corresponding to the language numbers Lg1 and Lg2 of the language selected as the subtitle language. In response to this, the graphic data M1 and M2 of the function selection menu in the language indicated by the menu language numbers L1 and L2 are output from the memory 11.

For example, when the subtitle language number Lg1 indicates English, the video signal processing circuit 5 outputs a signal representing “2” as the menu language number L1, and when the subtitle language number Lg2 indicates French, the video signal processing is performed. The circuit 5 outputs a signal representing “3” as the menu language number L2.
The memory 11 receives the menu language number L1 = 2 and outputs the graphic data of the English function selection menu as data M1, receives the menu language number L2 = 3, and receives the graphic data of the French function selection menu as data M2. Output as.
The graphic data M1 and M2 read from the memory 11 are input to the video signal processing circuit 5 and synthesized with the video signals Ps1 and Ps2 together with the caption signals SB1 and SB2, respectively.

In order for the user of the projection display apparatus to select and execute an arbitrary function using the function selection menu, the user wears the P-wave vision recognition glasses 9P or the S-wave vision recognition glasses 9S and looks at the screen. Only the function selection menu of the desired language is visually recognized.
For example, when the language is selected as described above, the P-wave viewing glasses 9P are put on when the English function selection menu is used, and the S-wave viewing is used when the French function selection menu is used. It is only necessary to wear glasses 9S.

According to the present embodiment, it is possible for the user of the projection display apparatus to automatically display the function selection menu in a language corresponding to the language of the subtitles of the projected image without switching the language of the function selection menu by himself / herself. It becomes.
Therefore, for example, in the case of an international conference where participants who use different languages gather, when a plurality of speakers or participants give a lecture or speak alternately while displaying a series of videos, the displayed video itself Even without switching, it is possible to use the function by using the function selection menu of the language that the speaker wearing different polarization viewing glasses can see.

  In the above embodiment, the language of the function selection menu is selected by the language number corresponding to the selected subtitle language. Instead of doing this, for example, in the international conference, the projection type is selected. When the video data prepared by the lecturer is displayed and explained using the video display device, two language numbers are added to the video data, and two functions are automatically selected based on the added language numbers. It is also possible to select the menu language.

  In the above example, the function selection menu includes operation instruction characters. However, the present invention is also applicable to the case of selective display and selective visual recognition of operation instruction characters not included in the function selection menu.

Embodiment 3 FIG.
In FIGS. 1 and 4, the polarization viewing glasses 9P for selecting and viewing P-wave images and the polarization viewing glasses 9S for selecting and viewing S-wave images are separated. It is shown.
Instead, one polarization viewing eyeglass 9 is configured to be switchable between a first state in which a P-wave image is selected and viewed and a second state in which an S-wave image is selected and viewed. In addition, the state may be selected according to the caption to be visually recognized or the function selection menu. The glasses shown in FIG. 7 are configured to enable such switching.

  The glasses shown in FIG. 7 are arranged so as to correspond to the left and right eyes of a human, and transparent plates 13a and 13b each having a polarizing film that transmits polarized light in one direction, and a rim that holds the transparent plates 13a and 13b. 14a, 14b, a bridge 14c for connecting adjacent portions of the rims 14a, 14b to each other, and temples 16a, 16b rotatably connected to outer portions of the rims 14a, 14b.

  The transparent plates 13a and 13b to which the polarizing film is attached are used as optical means for transmitting polarized light in one direction, and the feature of the glasses for viewing shown in FIG. 7 is that the transparent plate to which the polarizing film is attached. 13a and 13b can be rotated 90 degrees around the optical axis, and the first state (FIG. 7A) for selecting and visually recognizing the P-wave image, and the S-wave Any one of the second states (FIG. 7B) for selecting and visually recognizing the video can be selected.

  As a mechanism for rotating the transparent plates 13a and 13b, the transparent plates 13a and 13b can be protruded by opening the upper side and the outer sides of the rims 14a and 14b, and the lower side. The edges of the transparent plates 13a and 13b may be held and slid along grooves (not shown) provided in the inner side portions. In this case, when the transparent plates 13a and 13b are square as shown in the figure, only the two corner portions are held in the grooves of the rims 14a and 14b during the rotation.

Further, by providing the knobs 15a and 15b on the transparent plates 13a and 13b, the transparent plates 13a and 13b can be easily held.
The transparent plates 13a and 13b are square, and the rims 14a and 14b are structured to hold the transparent plates 13a and 13b by grooves provided in the lower side and the inner side. Can be confirmed.
Further, when the transparent plates 13a and 13b are in the first and second states, protrusions (not shown) provided in the vicinity of the edges of the transparent plates 13a and 13b and concave portions (not shown) provided in the grooves of the rims 14a and 14b. When the transparent plates 13a and 13b are in the first and second states, the transparent plates 13a and 13b can be elastically fixed.

  Instead of the configuration in which the transparent plates 13a and 13b are rotated 90 degrees while being held in the rims 14a and 14b as described above, the transparent plates 13a and 13b can be attached to and detached from the rims 14a and 14b only from above. In order to change the state of the transparent plates 13a and 13b, the transparent plates 13a and 13b may be once extracted from above, rotated 90 degrees, and then inserted from above.

  By using the glasses of the above embodiment and selecting the state of the transparent plates 13a and 13b, the user or viewer of the projection display apparatus can view either one of the P wave image or the S wave image. It can be arbitrarily selected and visually recognized.

Embodiment 4 FIG.
An eyeglass assembly 19 shown in FIG. 8 can be used instead of the eyeglasses 9 shown in FIG.
The eyeglass assembly 19 shown in FIG. 8 is the same as the eyeglasses 9 shown in FIG. 7 except that an audio signal changeover switch 20 and a headphone speaker 21 are added, and its functional block diagram is shown in FIG.

An example of a projection display apparatus used with the eyeglass assembly 19 is configured as shown in FIG. The projection display apparatus shown in FIG. 10 is the same as that shown in FIG. 1, but among the audio signals Ai from the video signal output device 10, the audio signals AP and AS in the selected language are selected by the selection circuit 4. Selected and output.
In the first embodiment described with reference to FIG. 1 and the second embodiment described with reference to FIG. 4, the same audio signal is generally selectively output. Since this is not a feature of the first and second embodiments, detailed description thereof is omitted.

  Another example of the projection display apparatus used with the eyeglass assembly 19 of FIGS. 8 and 9 is configured as shown in FIG. The projection display apparatus shown in FIG. 10 is the same as that shown in FIG. 1, but an audio signal from a sound source different from the image signal output device 10, for example, microphones 23 a, 23 b, 23 c is input to the audio selection circuit 24. Has been. The microphones 23a, 23b, and 23c are used by, for example, a speaker who speaks in different languages, or an interpreter. Voices in different languages are input, and audio signals A1, A2, and A3 are input from the microphones 23a, 23b, and 23c, respectively. 24 is input. The voice selection circuit 24 selects a voice signal in the language of the language numbers Lg1 and Lg2 from the input voice signals A1, A2 and A3 according to the language numbers Lg1 and Lg2 output from the operation input means 3. And output as audio signals AP and AS, respectively. In this case, it may be designated in advance in which language each microphone is used for input, and it is separately detected which microphone is used for which language voice, and the operation input means 3 or A separate input means (not shown) may be used to input to the voice selection circuit 24.

  As shown in FIGS. 8 and 9, the audio signal changeover switch 20 receives two audio signals AP and AS. The audio signal AP corresponds to the first language number Lg1, and therefore corresponds to the language of the subtitles included in the video formed by the P-wave video light. The audio signal AS is the second language number Lg1. This corresponds to the language number Lg2, and therefore corresponds to the language of the subtitles included in the video formed with the S-wave video light.

  The audio signal changeover switch 20 receives the two audio signals AP and AS, selects one of them according to the state of the transparent plate 13b, and outputs it as the selected audio signal AO. That is, when the transparent plate 13b is in the first state (a state in which the P wave is transmitted), the audio signal AP is selected, and when the transparent plate 13b is in the second state (a state in which the S wave is transmitted), the audio signal is selected. The signal AS is selected. For detecting whether the transparent plate 13b is in the first state or the second state, for example, as shown in FIG. 12 (in FIG. 12, the rim holding the transparent plate 13c is not shown), the transparent plate A magnet 13d is attached to a specific portion 13c of 13b, for example, a portion near one corner, and this magnet 13c is detected by a sensor 25 including a Hall element. The specific portion 13c is, for example, in a position facing the Hall element when the transparent plate 13b is in the first state and not facing the Hall element when the transparent plate 13b is in the second state. The changeover switch 20 is controlled based on the detection result by the sensor 25.

  The audio signal AO selected by the changeover switch 20 is input to the headphone speaker 21 and provided to the viewer as audio.

  As a result, as shown in FIG. 9, when the P wave image is viewed with the transparent plate 13b of the polarized light viewing glasses in the first state, the audio signal AP corresponding to the image is automatically selected, and the viewer Can hear the sound from the headphones. The same applies to the case of viewing the S wave image. When the S wave image is viewed with the transparent plate 13b of the polarization viewing glasses in the second state, the audio signal AS corresponding to the image is automatically selected and viewed. One can hear the sound from the headphones.

  According to the present invention, for example, two types of movies are simultaneously shown in an international passenger plane, and the viewer is allowed to select a favorite movie. Either of them can be selected.

It is the schematic which shows the structure of the projection type video display apparatus concerning Embodiment 1 of this invention. In Embodiment 1 of this invention, it is the figure which showed the process which synthesize | combines two video signals and two subtitle signals, respectively, and produces | generates two synthetic | combination video signals. In the first embodiment of the present invention, an image PC obtained by optically synthesizing P-wave image light PP and S-wave image light PS is selected using either P-wave or S-wave polarized light viewing glasses. It is the figure which showed the image | video which a viewer sees when either image | video is visually recognized. It is the schematic which shows the structure of the projection type video display apparatus concerning Embodiment 2 of this invention. In Embodiment 2 of this invention, it is a figure which shows the state in which the function selection menu is synthesize | combined with the image | video and projected. It is a table | surface which shows the function selection menu of a different language memorize | stored in the memory of the projection type video display apparatus concerning Embodiment 2 of this invention, and each language number. It is a figure which shows the spectacles for selecting arbitrarily the P wave video light and the S wave video light of the projection type video display apparatus concerning Embodiment 3 of this invention, and visually recognizing. It is a schematic perspective view which shows the spectacles assembly for visual recognition used in Embodiment 4 of this invention. It is a functional block diagram which shows the spectacles assembly for visual recognition used in Embodiment 4 of this invention. It is the schematic which shows an example of the projection type video display apparatus which can be used with the spectacles assembly for visual recognition of Embodiment 4 of this invention. It is the schematic which shows the other example of the projection type video display apparatus which can be used with the spectacles assembly for visual recognition of Embodiment 4 of this invention. It is the schematic which shows the sensor which detects the state of the spectacles assembly for visual recognition of Embodiment 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source lamp, 2 Polarization separation means, 3 Operation input means, 4 Selection circuit, 5 Image signal processing circuit, 6P Image formation means, 6S Image formation means, 7 Polarization composition means, 8 Projection lens, 9 Polarized vision recognition glasses, 9P P-wave viewing glasses, 9S S-wave viewing glasses, 10 video signal output device, 11 memory, 12 screen, 13a, 13b transparent plate, 14a, 14b rim, 14c bridge, 15a, 15b knob, 16a, 16b temple , 19 glasses assembly, 20 audio signal selector switch, 21 headphone speaker, 23a, 23b, 23c microphone, 24 audio selection circuit, 25 sensor.

Claims (6)

In a projection display device that projects an image on a screen,
Polarization separation means for separating light emitted from the light source means into two mutually orthogonal first and second polarized light;
The first subtitle signal representing the first subtitle in the first language is synthesized with the first video signal to generate the first composite video signal, and the second subtitle in the second language is represented. Video signal processing means for combining the second caption signal and the second video signal to generate a second composite video signal;
A first video light having the first polarization modulated by the first composite video signal is output by passing the first polarization at a pass rate according to the first composite video signal. 1 image light forming means;
A second image light of the second polarization modulated by the second synthesized video signal is output by passing the second polarized light at a pass rate according to the second synthesized video signal. Two image light forming means;
Combining and projecting the first and second image lights and projecting them to display an image ;
Storage means for storing image data of first and second operation instruction characters expressed in at least two languages ,
The video signal processing means synthesizes the image data of the first operation instruction character together with the first video signal together with the first caption signal, and the image data of the second operation instruction character. Combine with the second video signal together with the second caption signal
A projection display apparatus characterized by the above . The storage means stores image data of three or more operation instruction characters expressed in three or more different languages;
The video signal processing means selects one of the image data of the three or more operation instruction characters according to the language of the first subtitle and uses it as image data of the first operation character, depending on the language of the second subtitle, claim 1 which comprises using as the image data of the second operation characters by selecting another one of a image data of the three or more operation instruction character The projection type image display device described in 1. A projection display apparatus according to claim 1 or 2 ,
And a polarization viewing means for transmitting one polarized image light of the projected composite image. The polarized light visualizing means includes:
Optical means for transmitting polarized light in one direction,
The optical means is switchable between a first state and a second state;
The optical means includes
Transmitting the first image light of the first polarization when in the first state;
The display system according to claim 3 , wherein the second image light having the second polarization is transmitted when in the second state. The display system according to claim 4 , wherein switching between the first state and the second state is performed by rotating the optical unit 90 degrees about the optical axis. Audio signal switching means for selecting one of the first and second audio signals depending on whether the optical means is in the first state or the second state;
The display system according to claim 4, further comprising: audio output means for outputting the selected audio signal as audio.

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